The original matrix is
2  3  4  5
5  6  7  8
1  2  3  4

Rows sums are:
Row 1 : 14
Row 2 : 26
Row 3 : 10

Column Sums are:
Col 1 : 8
Col 2 : 11
Col 3 : 14
Col 4 : 17

Diagonal Sums are:
Not a square matrix

Sum of the Matrix is 50
Mean of the Matrix is 4.17

New Matrix After rotation is
2  5  1
3  6  2
4  7  3
5  8  4

That's all, Rock...